Flying a 30yo 5 octaves kb is asking for trouble if you're not sure it's sold already. All that for a Polysix? Beware not to have to bring it back...
-Roland JX3P+PG200, D50+PG1000, Juno 106, MKS50/70, JP8080, U220, MVS1, MSE1, MDC1, MOC1, TR707
-Korg M1R/M3R, MicroKorg, Micro X, Kaossilator, Monotron X3
-Yamaha DX7, TX816, Motif Rack
-Future Retro 777, DSI Mopho, EMU Proteus FX